backtick to NOT set variable

From: Max Ivanov <>
Date: Wed, 18 May 2016 12:42:25 +0100


can backtick (or combination of other scripts commands) can be to NOT
set env var on error?

here is a toy example:

#!./bin/execlineb -S0
backtick -n MAYBE_ARG { /bin/false }
import -u MAYBE_ARG
s6-echo ${MAYBE_ARG} $_at_

when running under strace I see that it passes empty arg "" to command.

I could add `-s` flag, to `import` and it solves problem for an empty value,
but it also splits non empty value which is not desirable.

Received on Wed May 18 2016 - 11:42:25 UTC

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